Hostname: page-component-848d4c4894-xfwgj Total loading time: 0 Render date: 2024-07-03T11:50:33.993Z Has data issue: false hasContentIssue false
  • English
  • Français

Estimation of Cocoon Populations of the Larch Sawfly, Pristiphora erichsonii (Hartig)1

Published online by Cambridge University Press:  31 May 2012

W. G. H. Ives  and
W. J. Turnock
W. G. H. Ives
Affiliation:
Forest Biology Laboratory, Winnipeg, Manitoba
W. J. Turnock
Affiliation:
Forest Biology Laboratory, Winnipeg, Manitoba
Get access Rights & Permissions [Opens in a new window]

Extract

This paper is one in a series on techniques used in estimating populations of various stages of the larch sawfly (Ives, 1955b; Ives and Prentice, 1958). This insect spends most of the year in cocoons in the soil beneath the host tree. The objective of accurate estimation of the cocoon population is to provide a basis for the evaluation of mortality factors affecting this stage. Two methods of estimation are considered in this paper. One is based on soil sampling (Part I) and the other on the number of cocoons formed in traps for falling larvae (Part 11).

Type
Articles
Information
The Canadian Entomologist , Volume 91 , Issue 10 , October 1959 , pp. 650 - 661
Copyright
Copyright © Entomological Society of Canada 1959

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

Buckner, C. H. 1953. Small mammals as predators of the larch sawfly. Can. Dept. Agric., Forest Biology Div. Bi-Monthly Prog. Rept. 9(6): 2.Google Scholar
Buckner, C. H. 1957. Population studies on small mammals of southeastern Manitoba. Jour. Mammalogy. 38: 87–97.CrossRefGoogle Scholar
Ives, W. G. H. 1955a. Effect of moisture on the selection of cocooning sites by the larch sawfly, Pristiphora erichsonii (Hartig). Can. Ent. 87: 301–311.CrossRefGoogle Scholar
Ives, W. G. H. 1955b. Estimation of egg populations of the larch sawfly, Pristiphora erichsonii (Hartig). Can. Jour. Zool. 33: 370–388.CrossRefGoogle Scholar
Ives, W. G. H., and Prentice, R. M.. 1958. A sequential sampling technique for surveys of the larch sawfly Can. Ent. 90: 331–338.CrossRefGoogle Scholar
Prebble, M. L. 1943. sampling methods in population studies of the European spruce sawfly, Gilpinia hercyniae (Hartig) in eastern Canada. Trans. Roy. Soc. Can., Third Series, Section V. 37: 93–126.Google Scholar
Turnock, W. J., and Ives, W. G. H.. 1957. An instrument for measuring the radii of tree crowns. For. Chron. 33: 355–357.CrossRefGoogle Scholar